EU-ZEM Project, EU and Switzerland
Integration (embedding) of optical fiber sensors in the filament winding production process
High pressure tank monitoring
Clients:Fiat Research Centre (CRF)
Début des travaux:2001
Fin des travaux:2004
Installation:Ullit/Smartec/ Airborne/ Un. Of Strathclyde
An all-composite CNG tank consists of one liner wrapped in hoop and longitudinal direction with structural carbon filaments. In order to allow labeling and to offer better protection of the external surface, a protecting layer with glass fiber reinforcing is added. In this particular project, thermoset matrix was used. The use of an all-composite tank reduces the weight of tanks from 400 kg (stell tanks) to 40 kg, but also requires regular inspection.
Objectifs de contrôle:
The ZEM project addresses the development of a monitoring system to verify the integrity of composite high pressure tanks for natural gas or hydrogen. Stationary and mobile applications are considered and a demonstrator related to vehicle propulsion will be developed. Currently proposed inspection techniques of composite vessels involve off-vehicle visual inspection and pressure testing which is labour intensive and requires expensive equipment. The proposed approach, based on fibre optic sensors, facilitates simple but detailed evaluation of the structural integrity, monitored on-line during tank refuelling. The aims are to eliminate the requirement for periodical inspection through different levels of monitoring on-board, at the refilling station and at the garage.The project focuses in particular fibre optic sensors and their embedding in the material, composite tank manufacturing, signature recognition algorithms and interrogation methods.The sensors are embedded between the last carbon layer and protection layer, and the SOFO system was used.
Nombre de capteurs:0
Cucurrent status: Sensor based on SOFO technology, embeddable in composite material succesfully develloped, applied and tested. Sensor topologies for damage detection succesfully developed and tested. Algorithms for damage assessment successfully develloped and tested.
Health monitoring of a full composite CNG tanks using long-gage fiber optic sensors, B. Glisic, D. Inaudi, 11th SPIE's Annual International Symposium on Smart Structures and Materials, March 14-18, 2004, San Diego, USA , (2004), Vol. 5384-7
Sensing tape for easy integration of optical fiber sensors in composite structures, B. Glisic, D. Inaudi, 16th International Conference on Optical Fiber Sensors, Nara, Japan, 13th -17th October , (2003)